Dism Error 87 Fixed -

Missing colon after Online .

Open CMD as Administrator. Step 2: Type DISM /? and press Enter. This shows the full help menu. Step 3: To see syntax for specific operations, use:

DISM /Online: /? DISM /Image: /? DISM /Cleanup-Image /? If a particular switch doesn’t appear in the help list, it doesn’t exist in your version of Windows (e.g., some switches are only for Windows PE). If your path contains spaces or unusual characters, wrap the path in double quotes and escape spaces properly. dism error 87 fixed

If you are copying commands from a website, paste them into Notepad first and look for auto‑formatted slashes. If you are unsure about a specific DISM switch, let DISM teach you the correct format.

If you are a Windows user who has ever tried to repair a corrupted system image using the Deployment Imaging and Service Management (DISM) tool, you may have encountered a frustrating roadblock: DISM Error 87 . Missing colon after Online

Let’s fix it. In 90% of cases, Error 87 is caused by a missing colon after Online . Many old tutorials omit the colon, but modern Windows versions require it strictly.

DISM \Online \Cleanup-Image Right: DISM /Online: /Cleanup-Image and press Enter

When you type a DISM command (for example, to check health or restore health), the tool parses every space, slash, and colon. is the DISM equivalent of "I don’t understand what you just typed." It indicates that the syntax is incorrect, a parameter is misspelled, or a colon is missing.